Who owns MAC prefix 70B3D5708?

70B3D5708 is registered to IBM Research GmbH in the IEEE MA-S registry.

What devices use 70B3D5708?

Any network device with a MAC address starting 70:B3:D5:70:8 was manufactured by or for IBM Research GmbH.

MA-S · OUI prefix

IBM Research GmbH

Any MAC address starting 70:B3:D5:70:8 is registered to IBM Research GmbH in CH.

OUI prefix	70B3D5708
Vendor	IBM Research GmbH
Registry	MA-S (36-bit, small block)
Country	CH
Example MAC	70:B3:D5:70:8:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D5708 to IBM Research GmbH. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 70:B3:D5:70:8, it is IBM Research GmbH hardware.

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